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linux/arch/sh/kernel/disassemble.c
Gustavo A. R. Silva 54b13723f7 sh: kernel: disassemble: Mark expected switch fall-throughs 
Remove logically dead code and mark switch cases where we are expecting
to fall through.

Fix the following warnings (Building: defconfig sh):

arch/sh/kernel/disassemble.c:478:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]
arch/sh/kernel/disassemble.c:487:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]
arch/sh/kernel/disassemble.c:496:8: warning: this statement may fall
through [-Wimplicit-fallthrough=]

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
2019-08-11 16:15:16 -05:00

572 lines
18 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/*
* Disassemble SuperH instructions.
*
* Copyright (C) 1999 kaz Kojima
* Copyright (C) 2008 Paul Mundt
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <asm/ptrace.h>
/*
* Format of an instruction in memory.
*/
typedef enum {
HEX_0, HEX_1, HEX_2, HEX_3, HEX_4, HEX_5, HEX_6, HEX_7,
HEX_8, HEX_9, HEX_A, HEX_B, HEX_C, HEX_D, HEX_E, HEX_F,
REG_N, REG_M, REG_NM, REG_B,
BRANCH_12, BRANCH_8,
DISP_8, DISP_4,
IMM_4, IMM_4BY2, IMM_4BY4, PCRELIMM_8BY2, PCRELIMM_8BY4,
IMM_8, IMM_8BY2, IMM_8BY4,
} sh_nibble_type;
typedef enum {
A_END, A_BDISP12, A_BDISP8,
A_DEC_M, A_DEC_N,
A_DISP_GBR, A_DISP_PC, A_DISP_REG_M, A_DISP_REG_N,
A_GBR,
A_IMM,
A_INC_M, A_INC_N,
A_IND_M, A_IND_N, A_IND_R0_REG_M, A_IND_R0_REG_N,
A_MACH, A_MACL,
A_PR, A_R0, A_R0_GBR, A_REG_M, A_REG_N, A_REG_B,
A_SR, A_VBR, A_SSR, A_SPC, A_SGR, A_DBR,
F_REG_N, F_REG_M, D_REG_N, D_REG_M,
X_REG_N, /* Only used for argument parsing */
X_REG_M, /* Only used for argument parsing */
DX_REG_N, DX_REG_M, V_REG_N, V_REG_M,
FD_REG_N,
XMTRX_M4,
F_FR0,
FPUL_N, FPUL_M, FPSCR_N, FPSCR_M,
} sh_arg_type;
static struct sh_opcode_info {
char *name;
sh_arg_type arg[7];
sh_nibble_type nibbles[4];
} sh_table[] = {
{"add",{A_IMM,A_REG_N},{HEX_7,REG_N,IMM_8}},
{"add",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_C}},
{"addc",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_E}},
{"addv",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_F}},
{"and",{A_IMM,A_R0},{HEX_C,HEX_9,IMM_8}},
{"and",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_9}},
{"and.b",{A_IMM,A_R0_GBR},{HEX_C,HEX_D,IMM_8}},
{"bra",{A_BDISP12},{HEX_A,BRANCH_12}},
{"bsr",{A_BDISP12},{HEX_B,BRANCH_12}},
{"bt",{A_BDISP8},{HEX_8,HEX_9,BRANCH_8}},
{"bf",{A_BDISP8},{HEX_8,HEX_B,BRANCH_8}},
{"bt.s",{A_BDISP8},{HEX_8,HEX_D,BRANCH_8}},
{"bt/s",{A_BDISP8},{HEX_8,HEX_D,BRANCH_8}},
{"bf.s",{A_BDISP8},{HEX_8,HEX_F,BRANCH_8}},
{"bf/s",{A_BDISP8},{HEX_8,HEX_F,BRANCH_8}},
{"clrmac",{0},{HEX_0,HEX_0,HEX_2,HEX_8}},
{"clrs",{0},{HEX_0,HEX_0,HEX_4,HEX_8}},
{"clrt",{0},{HEX_0,HEX_0,HEX_0,HEX_8}},
{"cmp/eq",{A_IMM,A_R0},{HEX_8,HEX_8,IMM_8}},
{"cmp/eq",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_0}},
{"cmp/ge",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_3}},
{"cmp/gt",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_7}},
{"cmp/hi",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_6}},
{"cmp/hs",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_2}},
{"cmp/pl",{A_REG_N},{HEX_4,REG_N,HEX_1,HEX_5}},
{"cmp/pz",{A_REG_N},{HEX_4,REG_N,HEX_1,HEX_1}},
{"cmp/str",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_C}},
{"div0s",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_7}},
{"div0u",{0},{HEX_0,HEX_0,HEX_1,HEX_9}},
{"div1",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_4}},
{"exts.b",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_E}},
{"exts.w",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_F}},
{"extu.b",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_C}},
{"extu.w",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_D}},
{"jmp",{A_IND_N},{HEX_4,REG_N,HEX_2,HEX_B}},
{"jsr",{A_IND_N},{HEX_4,REG_N,HEX_0,HEX_B}},
{"ldc",{A_REG_N,A_SR},{HEX_4,REG_N,HEX_0,HEX_E}},
{"ldc",{A_REG_N,A_GBR},{HEX_4,REG_N,HEX_1,HEX_E}},
{"ldc",{A_REG_N,A_VBR},{HEX_4,REG_N,HEX_2,HEX_E}},
{"ldc",{A_REG_N,A_SSR},{HEX_4,REG_N,HEX_3,HEX_E}},
{"ldc",{A_REG_N,A_SPC},{HEX_4,REG_N,HEX_4,HEX_E}},
{"ldc",{A_REG_N,A_DBR},{HEX_4,REG_N,HEX_7,HEX_E}},
{"ldc",{A_REG_N,A_REG_B},{HEX_4,REG_N,REG_B,HEX_E}},
{"ldc.l",{A_INC_N,A_SR},{HEX_4,REG_N,HEX_0,HEX_7}},
{"ldc.l",{A_INC_N,A_GBR},{HEX_4,REG_N,HEX_1,HEX_7}},
{"ldc.l",{A_INC_N,A_VBR},{HEX_4,REG_N,HEX_2,HEX_7}},
{"ldc.l",{A_INC_N,A_SSR},{HEX_4,REG_N,HEX_3,HEX_7}},
{"ldc.l",{A_INC_N,A_SPC},{HEX_4,REG_N,HEX_4,HEX_7}},
{"ldc.l",{A_INC_N,A_DBR},{HEX_4,REG_N,HEX_7,HEX_7}},
{"ldc.l",{A_INC_N,A_REG_B},{HEX_4,REG_N,REG_B,HEX_7}},
{"lds",{A_REG_N,A_MACH},{HEX_4,REG_N,HEX_0,HEX_A}},
{"lds",{A_REG_N,A_MACL},{HEX_4,REG_N,HEX_1,HEX_A}},
{"lds",{A_REG_N,A_PR},{HEX_4,REG_N,HEX_2,HEX_A}},
{"lds",{A_REG_M,FPUL_N},{HEX_4,REG_M,HEX_5,HEX_A}},
{"lds",{A_REG_M,FPSCR_N},{HEX_4,REG_M,HEX_6,HEX_A}},
{"lds.l",{A_INC_N,A_MACH},{HEX_4,REG_N,HEX_0,HEX_6}},
{"lds.l",{A_INC_N,A_MACL},{HEX_4,REG_N,HEX_1,HEX_6}},
{"lds.l",{A_INC_N,A_PR},{HEX_4,REG_N,HEX_2,HEX_6}},
{"lds.l",{A_INC_M,FPUL_N},{HEX_4,REG_M,HEX_5,HEX_6}},
{"lds.l",{A_INC_M,FPSCR_N},{HEX_4,REG_M,HEX_6,HEX_6}},
{"ldtlb",{0},{HEX_0,HEX_0,HEX_3,HEX_8}},
{"mac.w",{A_INC_M,A_INC_N},{HEX_4,REG_N,REG_M,HEX_F}},
{"mov",{A_IMM,A_REG_N},{HEX_E,REG_N,IMM_8}},
{"mov",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_3}},
{"mov.b",{ A_REG_M,A_IND_R0_REG_N},{HEX_0,REG_N,REG_M,HEX_4}},
{"mov.b",{ A_REG_M,A_DEC_N},{HEX_2,REG_N,REG_M,HEX_4}},
{"mov.b",{ A_REG_M,A_IND_N},{HEX_2,REG_N,REG_M,HEX_0}},
{"mov.b",{A_DISP_REG_M,A_R0},{HEX_8,HEX_4,REG_M,IMM_4}},
{"mov.b",{A_DISP_GBR,A_R0},{HEX_C,HEX_4,IMM_8}},
{"mov.b",{A_IND_R0_REG_M,A_REG_N},{HEX_0,REG_N,REG_M,HEX_C}},
{"mov.b",{A_INC_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_4}},
{"mov.b",{A_IND_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_0}},
{"mov.b",{A_R0,A_DISP_REG_M},{HEX_8,HEX_0,REG_M,IMM_4}},
{"mov.b",{A_R0,A_DISP_GBR},{HEX_C,HEX_0,IMM_8}},
{"mov.l",{ A_REG_M,A_DISP_REG_N},{HEX_1,REG_N,REG_M,IMM_4BY4}},
{"mov.l",{ A_REG_M,A_IND_R0_REG_N},{HEX_0,REG_N,REG_M,HEX_6}},
{"mov.l",{ A_REG_M,A_DEC_N},{HEX_2,REG_N,REG_M,HEX_6}},
{"mov.l",{ A_REG_M,A_IND_N},{HEX_2,REG_N,REG_M,HEX_2}},
{"mov.l",{A_DISP_REG_M,A_REG_N},{HEX_5,REG_N,REG_M,IMM_4BY4}},
{"mov.l",{A_DISP_GBR,A_R0},{HEX_C,HEX_6,IMM_8BY4}},
{"mov.l",{A_DISP_PC,A_REG_N},{HEX_D,REG_N,PCRELIMM_8BY4}},
{"mov.l",{A_IND_R0_REG_M,A_REG_N},{HEX_0,REG_N,REG_M,HEX_E}},
{"mov.l",{A_INC_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_6}},
{"mov.l",{A_IND_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_2}},
{"mov.l",{A_R0,A_DISP_GBR},{HEX_C,HEX_2,IMM_8BY4}},
{"mov.w",{ A_REG_M,A_IND_R0_REG_N},{HEX_0,REG_N,REG_M,HEX_5}},
{"mov.w",{ A_REG_M,A_DEC_N},{HEX_2,REG_N,REG_M,HEX_5}},
{"mov.w",{ A_REG_M,A_IND_N},{HEX_2,REG_N,REG_M,HEX_1}},
{"mov.w",{A_DISP_REG_M,A_R0},{HEX_8,HEX_5,REG_M,IMM_4BY2}},
{"mov.w",{A_DISP_GBR,A_R0},{HEX_C,HEX_5,IMM_8BY2}},
{"mov.w",{A_DISP_PC,A_REG_N},{HEX_9,REG_N,PCRELIMM_8BY2}},
{"mov.w",{A_IND_R0_REG_M,A_REG_N},{HEX_0,REG_N,REG_M,HEX_D}},
{"mov.w",{A_INC_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_5}},
{"mov.w",{A_IND_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_1}},
{"mov.w",{A_R0,A_DISP_REG_M},{HEX_8,HEX_1,REG_M,IMM_4BY2}},
{"mov.w",{A_R0,A_DISP_GBR},{HEX_C,HEX_1,IMM_8BY2}},
{"mova",{A_DISP_PC,A_R0},{HEX_C,HEX_7,PCRELIMM_8BY4}},
{"movca.l",{A_R0,A_IND_N},{HEX_0,REG_N,HEX_C,HEX_3}},
{"movt",{A_REG_N},{HEX_0,REG_N,HEX_2,HEX_9}},
{"muls",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_F}},
{"mul.l",{ A_REG_M,A_REG_N},{HEX_0,REG_N,REG_M,HEX_7}},
{"mulu",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_E}},
{"neg",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_B}},
{"negc",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_A}},
{"nop",{0},{HEX_0,HEX_0,HEX_0,HEX_9}},
{"not",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_7}},
{"ocbi",{A_IND_N},{HEX_0,REG_N,HEX_9,HEX_3}},
{"ocbp",{A_IND_N},{HEX_0,REG_N,HEX_A,HEX_3}},
{"ocbwb",{A_IND_N},{HEX_0,REG_N,HEX_B,HEX_3}},
{"or",{A_IMM,A_R0},{HEX_C,HEX_B,IMM_8}},
{"or",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_B}},
{"or.b",{A_IMM,A_R0_GBR},{HEX_C,HEX_F,IMM_8}},
{"pref",{A_IND_N},{HEX_0,REG_N,HEX_8,HEX_3}},
{"rotcl",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_4}},
{"rotcr",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_5}},
{"rotl",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_4}},
{"rotr",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_5}},
{"rte",{0},{HEX_0,HEX_0,HEX_2,HEX_B}},
{"rts",{0},{HEX_0,HEX_0,HEX_0,HEX_B}},
{"sets",{0},{HEX_0,HEX_0,HEX_5,HEX_8}},
{"sett",{0},{HEX_0,HEX_0,HEX_1,HEX_8}},
{"shad",{ A_REG_M,A_REG_N},{HEX_4,REG_N,REG_M,HEX_C}},
{"shld",{ A_REG_M,A_REG_N},{HEX_4,REG_N,REG_M,HEX_D}},
{"shal",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_0}},
{"shar",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_1}},
{"shll",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_0}},
{"shll16",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_8}},
{"shll2",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_8}},
{"shll8",{A_REG_N},{HEX_4,REG_N,HEX_1,HEX_8}},
{"shlr",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_1}},
{"shlr16",{A_REG_N},{HEX_4,REG_N,HEX_2,HEX_9}},
{"shlr2",{A_REG_N},{HEX_4,REG_N,HEX_0,HEX_9}},
{"shlr8",{A_REG_N},{HEX_4,REG_N,HEX_1,HEX_9}},
{"sleep",{0},{HEX_0,HEX_0,HEX_1,HEX_B}},
{"stc",{A_SR,A_REG_N},{HEX_0,REG_N,HEX_0,HEX_2}},
{"stc",{A_GBR,A_REG_N},{HEX_0,REG_N,HEX_1,HEX_2}},
{"stc",{A_VBR,A_REG_N},{HEX_0,REG_N,HEX_2,HEX_2}},
{"stc",{A_SSR,A_REG_N},{HEX_0,REG_N,HEX_3,HEX_2}},
{"stc",{A_SPC,A_REG_N},{HEX_0,REG_N,HEX_4,HEX_2}},
{"stc",{A_SGR,A_REG_N},{HEX_0,REG_N,HEX_6,HEX_2}},
{"stc",{A_DBR,A_REG_N},{HEX_0,REG_N,HEX_7,HEX_2}},
{"stc",{A_REG_B,A_REG_N},{HEX_0,REG_N,REG_B,HEX_2}},
{"stc.l",{A_SR,A_DEC_N},{HEX_4,REG_N,HEX_0,HEX_3}},
{"stc.l",{A_GBR,A_DEC_N},{HEX_4,REG_N,HEX_1,HEX_3}},
{"stc.l",{A_VBR,A_DEC_N},{HEX_4,REG_N,HEX_2,HEX_3}},
{"stc.l",{A_SSR,A_DEC_N},{HEX_4,REG_N,HEX_3,HEX_3}},
{"stc.l",{A_SPC,A_DEC_N},{HEX_4,REG_N,HEX_4,HEX_3}},
{"stc.l",{A_SGR,A_DEC_N},{HEX_4,REG_N,HEX_6,HEX_3}},
{"stc.l",{A_DBR,A_DEC_N},{HEX_4,REG_N,HEX_7,HEX_3}},
{"stc.l",{A_REG_B,A_DEC_N},{HEX_4,REG_N,REG_B,HEX_3}},
{"sts",{A_MACH,A_REG_N},{HEX_0,REG_N,HEX_0,HEX_A}},
{"sts",{A_MACL,A_REG_N},{HEX_0,REG_N,HEX_1,HEX_A}},
{"sts",{A_PR,A_REG_N},{HEX_0,REG_N,HEX_2,HEX_A}},
{"sts",{FPUL_M,A_REG_N},{HEX_0,REG_N,HEX_5,HEX_A}},
{"sts",{FPSCR_M,A_REG_N},{HEX_0,REG_N,HEX_6,HEX_A}},
{"sts.l",{A_MACH,A_DEC_N},{HEX_4,REG_N,HEX_0,HEX_2}},
{"sts.l",{A_MACL,A_DEC_N},{HEX_4,REG_N,HEX_1,HEX_2}},
{"sts.l",{A_PR,A_DEC_N},{HEX_4,REG_N,HEX_2,HEX_2}},
{"sts.l",{FPUL_M,A_DEC_N},{HEX_4,REG_N,HEX_5,HEX_2}},
{"sts.l",{FPSCR_M,A_DEC_N},{HEX_4,REG_N,HEX_6,HEX_2}},
{"sub",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_8}},
{"subc",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_A}},
{"subv",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_B}},
{"swap.b",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_8}},
{"swap.w",{ A_REG_M,A_REG_N},{HEX_6,REG_N,REG_M,HEX_9}},
{"tas.b",{A_IND_N},{HEX_4,REG_N,HEX_1,HEX_B}},
{"trapa",{A_IMM},{HEX_C,HEX_3,IMM_8}},
{"tst",{A_IMM,A_R0},{HEX_C,HEX_8,IMM_8}},
{"tst",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_8}},
{"tst.b",{A_IMM,A_R0_GBR},{HEX_C,HEX_C,IMM_8}},
{"xor",{A_IMM,A_R0},{HEX_C,HEX_A,IMM_8}},
{"xor",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_A}},
{"xor.b",{A_IMM,A_R0_GBR},{HEX_C,HEX_E,IMM_8}},
{"xtrct",{ A_REG_M,A_REG_N},{HEX_2,REG_N,REG_M,HEX_D}},
{"mul.l",{ A_REG_M,A_REG_N},{HEX_0,REG_N,REG_M,HEX_7}},
{"dt",{A_REG_N},{HEX_4,REG_N,HEX_1,HEX_0}},
{"dmuls.l",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_D}},
{"dmulu.l",{ A_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_5}},
{"mac.l",{A_INC_M,A_INC_N},{HEX_0,REG_N,REG_M,HEX_F}},
{"braf",{A_REG_N},{HEX_0,REG_N,HEX_2,HEX_3}},
{"bsrf",{A_REG_N},{HEX_0,REG_N,HEX_0,HEX_3}},
{"fabs",{FD_REG_N},{HEX_F,REG_N,HEX_5,HEX_D}},
{"fadd",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_0}},
{"fadd",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_0}},
{"fcmp/eq",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_4}},
{"fcmp/eq",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_4}},
{"fcmp/gt",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_5}},
{"fcmp/gt",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_5}},
{"fcnvds",{D_REG_N,FPUL_M},{HEX_F,REG_N,HEX_B,HEX_D}},
{"fcnvsd",{FPUL_M,D_REG_N},{HEX_F,REG_N,HEX_A,HEX_D}},
{"fdiv",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_3}},
{"fdiv",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_3}},
{"fipr",{V_REG_M,V_REG_N},{HEX_F,REG_NM,HEX_E,HEX_D}},
{"fldi0",{F_REG_N},{HEX_F,REG_N,HEX_8,HEX_D}},
{"fldi1",{F_REG_N},{HEX_F,REG_N,HEX_9,HEX_D}},
{"flds",{F_REG_N,FPUL_M},{HEX_F,REG_N,HEX_1,HEX_D}},
{"float",{FPUL_M,FD_REG_N},{HEX_F,REG_N,HEX_2,HEX_D}},
{"fmac",{F_FR0,F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_E}},
{"fmov",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_C}},
{"fmov",{DX_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_C}},
{"fmov",{A_IND_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_8}},
{"fmov",{A_IND_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_8}},
{"fmov",{F_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}},
{"fmov",{DX_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}},
{"fmov",{A_INC_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_9}},
{"fmov",{A_INC_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_9}},
{"fmov",{F_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}},
{"fmov",{DX_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}},
{"fmov",{A_IND_R0_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_6}},
{"fmov",{A_IND_R0_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_6}},
{"fmov",{F_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}},
{"fmov",{DX_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}},
{"fmov.d",{A_IND_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_8}},
{"fmov.d",{DX_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}},
{"fmov.d",{A_INC_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_9}},
{"fmov.d",{DX_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}},
{"fmov.d",{A_IND_R0_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_6}},
{"fmov.d",{DX_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}},
{"fmov.s",{A_IND_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_8}},
{"fmov.s",{F_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}},
{"fmov.s",{A_INC_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_9}},
{"fmov.s",{F_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}},
{"fmov.s",{A_IND_R0_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_6}},
{"fmov.s",{F_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}},
{"fmul",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_2}},
{"fmul",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_2}},
{"fneg",{FD_REG_N},{HEX_F,REG_N,HEX_4,HEX_D}},
{"frchg",{0},{HEX_F,HEX_B,HEX_F,HEX_D}},
{"fschg",{0},{HEX_F,HEX_3,HEX_F,HEX_D}},
{"fsqrt",{FD_REG_N},{HEX_F,REG_N,HEX_6,HEX_D}},
{"fsts",{FPUL_M,F_REG_N},{HEX_F,REG_N,HEX_0,HEX_D}},
{"fsub",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_1}},
{"fsub",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_1}},
{"ftrc",{FD_REG_N,FPUL_M},{HEX_F,REG_N,HEX_3,HEX_D}},
{"ftrv",{XMTRX_M4,V_REG_N},{HEX_F,REG_NM,HEX_F,HEX_D}},
{ 0 },
};
static void print_sh_insn(u32 memaddr, u16 insn)
{
int relmask = ~0;
int nibs[4] = { (insn >> 12) & 0xf, (insn >> 8) & 0xf, (insn >> 4) & 0xf, insn & 0xf};
int lastsp;
struct sh_opcode_info *op = sh_table;
for (; op->name; op++) {
int n;
int imm = 0;
int rn = 0;
int rm = 0;
int rb = 0;
int disp_pc;
int disp_pc_addr = 0;
for (n = 0; n < 4; n++) {
int i = op->nibbles[n];
if (i < 16) {
if (nibs[n] == i)
continue;
goto fail;
}
switch (i) {
case BRANCH_8:
imm = (nibs[2] << 4) | (nibs[3]);
if (imm & 0x80)
imm |= ~0xff;
imm = ((char)imm) * 2 + 4 ;
goto ok;
case BRANCH_12:
imm = ((nibs[1]) << 8) | (nibs[2] << 4) | (nibs[3]);
if (imm & 0x800)
imm |= ~0xfff;
imm = imm * 2 + 4;
goto ok;
case IMM_4:
imm = nibs[3];
goto ok;
case IMM_4BY2:
imm = nibs[3] <<1;
goto ok;
case IMM_4BY4:
imm = nibs[3] <<2;
goto ok;
case IMM_8:
imm = (nibs[2] << 4) | nibs[3];
goto ok;
case PCRELIMM_8BY2:
imm = ((nibs[2] << 4) | nibs[3]) <<1;
relmask = ~1;
goto ok;
case PCRELIMM_8BY4:
imm = ((nibs[2] << 4) | nibs[3]) <<2;
relmask = ~3;
goto ok;
case IMM_8BY2:
imm = ((nibs[2] << 4) | nibs[3]) <<1;
goto ok;
case IMM_8BY4:
imm = ((nibs[2] << 4) | nibs[3]) <<2;
goto ok;
case DISP_8:
imm = (nibs[2] << 4) | (nibs[3]);
goto ok;
case DISP_4:
imm = nibs[3];
goto ok;
case REG_N:
rn = nibs[n];
break;
case REG_M:
rm = nibs[n];
break;
case REG_NM:
rn = (nibs[n] & 0xc) >> 2;
rm = (nibs[n] & 0x3);
break;
case REG_B:
rb = nibs[n] & 0x07;
break;
default:
return;
}
}
ok:
printk("%-8s ", op->name);
lastsp = (op->arg[0] == A_END);
disp_pc = 0;
for (n = 0; n < 6 && op->arg[n] != A_END; n++) {
if (n && op->arg[1] != A_END)
printk(", ");
switch (op->arg[n]) {
case A_IMM:
printk("#%d", (char)(imm));
break;
case A_R0:
printk("r0");
break;
case A_REG_N:
printk("r%d", rn);
break;
case A_INC_N:
printk("@r%d+", rn);
break;
case A_DEC_N:
printk("@-r%d", rn);
break;
case A_IND_N:
printk("@r%d", rn);
break;
case A_DISP_REG_N:
printk("@(%d,r%d)", imm, rn);
break;
case A_REG_M:
printk("r%d", rm);
break;
case A_INC_M:
printk("@r%d+", rm);
break;
case A_DEC_M:
printk("@-r%d", rm);
break;
case A_IND_M:
printk("@r%d", rm);
break;
case A_DISP_REG_M:
printk("@(%d,r%d)", imm, rm);
break;
case A_REG_B:
printk("r%d_bank", rb);
break;
case A_DISP_PC:
disp_pc = 1;
disp_pc_addr = imm + 4 + (memaddr & relmask);
printk("%08x <%pS>", disp_pc_addr,
(void *)disp_pc_addr);
break;
case A_IND_R0_REG_N:
printk("@(r0,r%d)", rn);
break;
case A_IND_R0_REG_M:
printk("@(r0,r%d)", rm);
break;
case A_DISP_GBR:
printk("@(%d,gbr)",imm);
break;
case A_R0_GBR:
printk("@(r0,gbr)");
break;
case A_BDISP12:
case A_BDISP8:
printk("%08x", imm + memaddr);
break;
case A_SR:
printk("sr");
break;
case A_GBR:
printk("gbr");
break;
case A_VBR:
printk("vbr");
break;
case A_SSR:
printk("ssr");
break;
case A_SPC:
printk("spc");
break;
case A_MACH:
printk("mach");
break;
case A_MACL:
printk("macl");
break;
case A_PR:
printk("pr");
break;
case A_SGR:
printk("sgr");
break;
case A_DBR:
printk("dbr");
break;
case FD_REG_N:
case F_REG_N:
printk("fr%d", rn);
break;
case F_REG_M:
printk("fr%d", rm);
break;
case DX_REG_N:
if (rn & 1) {
printk("xd%d", rn & ~1);
break;
}
/* else, fall through */
case D_REG_N:
printk("dr%d", rn);
break;
case DX_REG_M:
if (rm & 1) {
printk("xd%d", rm & ~1);
break;
}
/* else, fall through */
case D_REG_M:
printk("dr%d", rm);
break;
case FPSCR_M:
case FPSCR_N:
printk("fpscr");
break;
case FPUL_M:
case FPUL_N:
printk("fpul");
break;
case F_FR0:
printk("fr0");
break;
case V_REG_N:
printk("fv%d", rn*4);
break;
case V_REG_M:
printk("fv%d", rm*4);
break;
case XMTRX_M4:
printk("xmtrx");
break;
default:
return;
}
}
if (disp_pc && strcmp(op->name, "mova") != 0) {
u32 val;
if (relmask == ~1)
__get_user(val, (u16 *)disp_pc_addr);
else
__get_user(val, (u32 *)disp_pc_addr);
printk(" ! %08x <%pS>", val, (void *)val);
}
return;
fail:
;
}
printk(".word 0x%x%x%x%x", nibs[0], nibs[1], nibs[2], nibs[3]);
}
void show_code(struct pt_regs *regs)
{
unsigned short *pc = (unsigned short *)regs->pc;
long i;
if (regs->pc & 0x1)
return;
printk("Code:\n");
for (i = -3 ; i < 6 ; i++) {
unsigned short insn;
if (__get_user(insn, pc + i)) {
printk(" (Bad address in pc)\n");
break;
}
printk("%s%08lx: ", (i ? " ": "->"), (unsigned long)(pc + i));
print_sh_insn((unsigned long)(pc + i), insn);
printk("\n");
}
printk("\n");
}
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